DYNAMIC STRESS CHARACTERISTICS OF HIGH-SPEED RAILWAY SUBGRADE UNDER MOVING LOADS

被引：0
|
作者：
Song, X. L. [1 ]
Zhai, W. M. [1 ]
机构：
[1] SW Jiaotong Univ, Tract Power State Key Lab, Chengdu 610031, Peoples R China
来源：
ENVIRONMENTAL VIBRATIONS: PREDICTION, MONITORING, MITIGATION AND EVALUATION, VOLS I AND II | 2009年
关键词：
high-speed railway; subgrade; dynamic stress; numerical simulation; slab track;
D O I：
暂无
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
In this paper, a three-dimensional dynamic finite element model of track-subgrade interactive system is established. Using the model, the peak von-Mises dynamic stresses of a high-speed railway subgrade under moving loads with different speeds are analyzed, and the dynamic stress distributions of subgrade along lateral and vertical direction are also investigated. The results indicate that the von-Mises dynamic stress in the center of the subgrade surface is maximal; when the loads move at a low speed, the peak von-Mises dynamic stress of subgrade is not increased very obviously with the increment of the speed, while it is increased remarkably when the speed is over 250 km/h. It is also found that the dynamic stress distribution of subgrade with the speeds of moving loads below 200 km/h is different from that with the speeds of the moving loads over 200 km/h.
引用
收藏
页码：470 / 474
页数：5
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